LAUSR

OBJECTIVES To retrospectively assess the stereotactic one-pass BLES performance in excision of small groups of calcifications seen on mammogram that proved to be papillomas. METHODS Between January 2014 and January 2016, 37/400 cases (9.2%) of stereotactic BLES biopsies performed in our department due to suspicious calcifications proved to be papillomas. Lesions with atypia underwent surgical removal and lesions with no atypia were followed up for 2 years. BLES and surgical histology results, radiological removal and 2-years stability were statistically analysed to assess BLES performance in biopsy and excision of papillomas. RESULTS The mean mammographic size of papillomas was 6.54 mm (st dev = 3.85, range 2 mm-17 mm) and within the size excised by the BLES needle (20 mm). 4/37 cases (10.8%) showed atypia. BLES excision was achieved in 29/37 cases (78.4%); radiological removal based on post BLES mammogram was achieved in 25/29 cases (86.2%). In the remaining 8/37 cases the papillomas were seen at the ink of the specimens' margins; 3/8 cases showed residual calcifications on post-BLES mammogram. The BLES histology result of removal and the mammographic size of the papillomas were found to be statistically significant predictive factors of excision (p < 0,001, Fisher's exact test, Mann Whitney test). Follow up mammograms showed no change for a period of 2 years. CONCLUSION BLES is a safe and accurate technique to biopsy papillomas with high success rates of excision which could potentially minimize the need of subsequent radiological or surgical excision.